JPS63274952A - Dye fixing element - Google Patents

Abstract

PURPOSE:To prevent nonuniformity of image density and generation of adhesion failure by disposing a back layer contg. a hydrophilic colloid to the other side of a base provided with a dye fixed layer on one side and incorporating specific particles into the back layer. CONSTITUTION:At least one dye fixed layer contg. a mordant is provided on one side of the base and at least one back layer incorporated therein with the hydrophilic colloid is disposed on the opposite side. Matting agent particles having a grain size in excess of 10mum are incorporated in this back layer. The uneven colors of dye images and the adhesion of the dye image elements to each are prevented even after preservation of the dye fixing elements in superposition on each other by using the matting agent particles having such large grain size. An increase in the rough texture and haze of the back surface is obviated and smooth paper feeding is executed. A decrease in the content of a base or base precursor, etc., at the time of preservation is prevented and the sufficient image density is obtd.; in addition, the nonuniformity of the density at the time of transfer is prevented.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to dye fixing elements for receiving and fixing mobile dyes formed by thermal development.

Prior art and its problems For information on how to obtain color images by heat development, see
Many methods have been proposed. Regarding the method of forming a color image by combining the oxidized form of a developer with a coupler, see
U.S. Pat. No. 3,531,286 uses a p-phenylene diamine reducing agent and a phenolic or activated methylene coupler; U.S. Pat. No. 3,761,270 uses a p-aminophenol reducing agent; Belgian Patent No. 802, 51
No. 9 and Research Disclosure Magazine 1975 9
A sulfonamidophenol reducing agent is proposed on pages 31 and 32 of the same issue, and a combination of a sulfonamidophenol reducing agent and a 4-equivalent coupler is proposed in US Pat. No. 4,021,240.

However, in this method, a reduced silver image and a color image are simultaneously generated in the exposed area after thermal development, resulting in a problem that the color image becomes cloudy.

To solve this problem, there are methods to remove the silver image by liquid processing or to transfer only the dye to another layer, such as a sheet with an image-receiving layer. It has the disadvantage that it is not easy to transfer.

Furthermore, the above-mentioned methods generally require a relatively long time for development, and the resulting images have the drawbacks of high fog and low image density.

In order to improve these drawbacks, there are methods in which a mobile dye is imagewise released by heating, and this mobile dye is transferred to a dye fixing element with a mordant using a solvent such as water, and a method in which the dye is transferred to a dye fixing element with a mordant using a solvent such as water. How to transfer to a fixed element,
A method has been proposed in which the dye is transferred to a dye-fixing element using a hydrophilic thermal solvent built into the dye-fixing element, and a method in which the mobile dye is heat-diffusible or sublimable and is transferred to a dye-receiving element such as a support. (U.S. Patent Nos. 4,463,079, 4,474,867, 4,478,927,
4゜507.380, 4,500,626, 4,483,914: JP-A-58-14904
No. 6, No. 58-149047, No. 59-152440
No. 59-154445, No. 59-165054, No. 59-180548, No. 59-168439,
No. 59-174832, No. 59-174833, No. 59-174834, No. 59-174835, etc.).

In the above image forming method, receiving a mobile dye,
For fixing, a dye fixing element having at least one dye fixing layer is used.

However, under low humidity conditions, the dye fixing element may curl so that both ends are above the horizontal plane when the dye fixing layer is placed upward due to the shrinkage of the hydrophilic colloid contained in the dye fixing layer, or the dye fixing element may curl to a height above the horizontal plane. Under humid conditions, the dye fixing layer stretches due to the absorption of the hydrophilic colloid contained in the dye fixing layer, and when the dye fixing layer is placed downward, it curls so that both ends are above the horizontal plane. . As a method for improving curl prevention, a method is generally known in which a hydrophilic colloid layer (back layer) is coated on the back side of the dye fixing layer at an appropriate thickness to balance the curl.

In addition, the dye fixing layer usually contains salts such as bases or base precursors, thermal solvents, or dye transfer agents for the purpose of accelerating the development of the photosensitive layer or promoting the transfer of the dye from the photosensitive layer to the dye fixing layer. Low molecular weight compounds such as auxiliaries are often included.

When such dye-fixing elements are stored in layers, the hydrophilic colloid (binder such as gelatin) contained in the back layer is water-absorbing, so salts, hot solvents, dye transfer aids, etc. The concentration of salts such as bases or base precursors, and low-molecular compounds such as thermal solvents or dye transfer aids in the dye fixing layer decreases.
- There was a problem that the maximum density (Dmax) decreased and the image density became uneven. Furthermore, when the protective layer generally provided on the dye-fixing element is also a hydrophilic colloid layer or when the above-mentioned salts are present, adhesion failure is particularly likely to occur.

To prevent adhesion in photographic elements, particle sizes ranging from 1 to 10 μm have traditionally been used.
The back layer may contain a matting agent of about m (for example, Japanese Patent Laid-Open No. 61-205935), or the outermost back layer may be provided with projections and depressions.

However, the conventional method of containing a matting agent with a particle size of 1 to 10 μm does not provide a sufficient effect, and the method of providing unevenness is complicated.

Therefore, it is desired to develop a method for preventing both density unevenness and adhesion failure.

(2) Purpose of the Invention An object of the present invention is to provide a dye-fixing element which can prevent density unevenness in images and is free from adhesion failure.

■Disclosure of invention These objects are achieved by the invention described below.

That is, the present invention provides at least one
In a dye fixing element having a dye fixing layer and a back layer containing at least one hydrophilic colloid on the opposite side thereof, the back layer contains particles having a particle size exceeding 10 μm in a size of at least 0.002 cm. ' A dye fixing element characterized by containing 7m2 or more.

■Specific structure of the invention Hereinafter, a specific configuration of the present invention will be explained in detail.

The dye fixing element of the present invention has a dye fixing layer containing at least one mordant on one side of the support, and a back layer containing at least one hydrophilic colloid on the opposite side. This back layer has a grain size of 1
Matting agent particles greater than 0 μm, preferably 12-50 μm
m, particularly preferably 12 to 30 μm matting agent particles per m2 of support, preferably 0.002 g or more, preferably 0.0
5g/m2 to 0.5g/m2, particularly preferably 0.01
g/m2 to 0.3 g/m2.

0.002g/0.002g/of such large particle size matting agent particles
The reason why m2 or more is used is that if it is less than this, it is impossible to improve the unevenness of the dye image or the adhesion of the dye fixing elements that occur when the dye fixing elements are used after being stored in layers. Too again! When used in ffi, problems tend to occur, such as the back surface being rough and unpleasant to the touch, haze becoming large, and paper feeding not being able to be carried out smoothly during automatic paper feeding.

Therefore, it is usually appropriate to use it within a range of 0.5 g/m2 or less.

Further, in the present invention, the size of the matting agent particles present in the above amount is preferably larger than 10 μm, and is preferably at least twice the thickness of the coating film of the back layer, particularly at least 3 times the thickness of the coating film of the back layer. It is preferable.

When there are multiple back layers, it is preferable to add the matting agent to the layer closer to the support than the outermost back layer.
This is because by doing so, it is possible to prevent the matting agent from peeling off from the backing layer.

Matting agents are well known in the photographic art and can be defined as discrete solid particles of inorganic or organic material dispersible in a hydrophilic organic colloidal binder. Examples of inorganic matting agents include oxides (e.g. silicon dioxide, titanium oxide, magnesium oxide, aluminum oxide, etc.);
Alkaline earth metal salts (e.g. sulfates and carbonates)
(Specifically, barium sulfate, calcium carbonate, magnesium sulfate, etc.), silver halide particles that do not form images (silver chloride, silver bromide, etc., and may also contain a small amount of iodine as a halogen component), glass, etc. It is.

Further, examples of organic matting agents include starch (eg, corn starch, rice starch, etc.), cellulose ester (eg, cellulose acetate propionate, etc.), cellulose ether (eg, ethyl cellulose, etc.), synthetic resin, etc. Examples of synthetic resins include water-insoluble or poorly soluble synthetic polymers, such as alkyl (meth)acrylates, alkoxyalkyl meth)acrylates, glycicilyl (meth)acrylates, (meth)acrylamides, vinyl esters (e.g. vinyl acetate), acrylonitrile. , olefins (e.g. ethylene, etc.), styrene, benzoguanamine formaldehyde condensates, etc. alone or in combination, or together with acrylic acid, methacrylic acid, α,β-unsaturated dicarboxylic acids, hydroxyalkyl (meth)acrylates, sulfoalkyl (meth)acrylates, etc. ) Polymers containing a combination of acrylate, styrene sulfonic acid, etc. as monomer components can be used.

Others include epoxy resin, nylon, polycarbonate,
Phenol resin, polyvinyl Rubazole, polyvinylidene chloride, etc. can also be used.

Among these, benzoguanamine/formaldehyde condensation polymer [benzoguanamine resin: that is, those represented by the following formula: For example, the product Meiko poster (Nippon Shokubai Chemical Industry ■
), existing chemical substances 7-31, etc.], polyolefins (
Product name Flow beads LE-1080, CL-2080,
HE-5023; manufactured by Seitetsu Kagaku, or trade name Chemivar v-too; manufactured by Mitsui Petrochemical), polystyrene pieces (manufactured by Moltex), nylon pieces (manufactured by Moltex), AS resin beads (manufactured by Mortex), Epoxy resin pieces (manufactured by Moritex), polycarbonate resin pieces (manufactured by Moritex), etc. are preferred.

These matting agents may be used in combination.

The above-mentioned matting agent in the present invention is preferably hard; for example, it has a hardness of 40 or more, particularly preferably 60 or more, according to test method JIS-7215/durometer D.

The effects of the present invention are enhanced by using a hard matting agent.

The shape of the matting agent in the present invention may be either irregular or rounded, but rounded is more preferable than angular, and spherical is more preferable.

Further, the matting agent is preferably transparent or white, and more preferably transparent.

Colloidal silica may be used in the back layer of the present invention.

Colloidal silica has an average particle size of 7 mμ to 120 mμ, and its main component is silicon dioxide, and may also contain alumina, sodium aluminate, etc. as a minor component.

Further, these colloidal silicas may contain an inorganic base such as sodium hydroxide, potassium hydroxide, lithium hydroxide, ammonium hydroxide, or an organic salt such as tetramethylammonium ion as a stabilizer. In particular, as a stabilizer for colloidal silica, colloidal silica made of potassium hydroxide or ammonium hydroxide is preferred.

For these colloidal silicas, e.g. Egon M
atjjevic) i, 5surface and vol. 6 of oloid science, pp. 3-100 (
1973, John Willey & 5ons)
is described in detail.

Specific examples of colloidal silica include E, 1. du
Pont de Nemours & Go, (U.S.
A) to Ludox AM, Ludox As, Lu
Dox LS, Ludox TM, Ludox IIs and other product names; Nissan Chemical (Tokyo, Japan) sells Mon5anto Go with product names such as Snowtex 20, Snowtex C, Snowtex N5 and Snowtex O.
, (USA) 5ytonC-30,5yton
With product names such as 200, Na1co (:he[Il
, Go, (USA) Nalcoag 1030,
Nalcoag 1060, Nalcoag 10-2
Examples include those commercially available under trade names such as 1-64.

The amount of colloidal silica to be used is preferably 0.05 to 1.0, particularly preferably 0.2 to 0.7, in terms of dry weight ratio to gelatin used as a binder for the back layer.

The back layer in the present invention is formed by coating a hydrophilic colloid layer on the support opposite to the dye fixing layer and drying it. The hydrophilic colloid substance is preferably a hydrophilic organic polymer compound, and may be a commonly used hydrophilic natural or synthetic polymer, but preferably proteins such as gelatin and gelatin derivatives, cellulose derivatives, and starch. , natural substances such as polysaccharides such as gum arabic, water-soluble polyvinyl compounds such as polyvinyl alcohol, polyvinylpyrrolidone, and acrylamide polymers. Among these, gelatin or gelatin derivatives are preferred. As gelatin, in addition to lime-processed gelatin, acid-processed gelatin and the Journal of the Photographic Society of Japan (Bull, S.
oc, PhoiJapan) No. 16.30 page (
It is also possible to use enzyme-treated gelatin, gelatin hydrolysates, and enzymatically decomposed products as described in (1966).

As gelatin derivatives, various compounds such as acid halides, acid anhydrides, isocyanates, bromoacetic acids, alkanesultones, vinyl sulfonamides, maleimides, polyalkylene oxides, and epoxy compounds can be added to gelatin. Use products obtained by reacting gelatin with derivatives such as acrylic acid, methacrylic acid, their esters and amides, and single or copolymers of vinyl-based polymers such as acrylonitrile and styrene. Can be done.

The number of back layers may be one, two or more. There is no limit to the thickness of the back layer, but it is preferably 0.5 to 15 μm, particularly 1 to 10 μm.

There is no special limit to the amount of binder in the back layer, but it is usually 0.
．． A range of 5 g/m2 to 15 g/m2 is suitable.

Other known additives may be added to the back layer of the present invention as described below.

In the present invention, the dye fixing layer is capable of fixing the mobile dye released by development.
To fix the dye, polymer mordants and JP-A-57-
Dye-receiving polymers such as those described in No. 198,458 can be used.

In the present invention, the dye-receiving polymer that can be used in the dye-fixing layer has a glass transition temperature of 40°C or higher, 2.
It is made of an organic polymer material that is heat resistant to temperatures below 50°C. In the present invention, there are many points that are not clear regarding the mechanism by which the dye released from the dye-donating substance enters the polymer. Generally, it is believed that at a treatment temperature above the glass transition point, the thermal motion of the polymer chains becomes large, and as a result, the dye can enter into the gaps between the bundled chain molecules.

Therefore, by using a layer made of an organic polymer substance with a glass transition temperature of 40°C or higher and 250°C or lower as the dye-fixing layer, the dye-donating substance and the dye can be distinguished, and only the dye can enter the dye-fixing layer. Clear images can be formed.

Examples of organic polymeric substances used in the present invention include the following. To enumerate it, molecules 312,000~
85,000 polystyrene, polystyrene derivatives with substituents having 4 or less carbon atoms, polyacetals such as polyvinylcyclohexane, polydivinylbenzene, polyvinylpyrrolidone, polyvinylcarbazole, polyallylbenzene, polyvinyl alcohol, polyvinyl formal and polyvinyl butyral, polyvinyl chloride , chlorinated polyethylene, polytrichloridebutylene, polyacrylonitrile, polyN,N-dimethylacrylamide, p
-cyanophenyl group, pentachlorophenyl group and 2
, polyacrylate with 4-dichlorophenyl group, polyacryl chloroacrylate, polymethyl methacrylate, polyethyl methacrylate, polypropyl methacrylate, polyisopropyl methacrylate, polyisobutyl methacrylate, polytert-butyl methacrylate, polycyclohexyl methacrylate, polyethylene glycol dimethacrylate, Examples include polyesters such as poly-2-cyano-ethyl methacrylate and polyethylene terephthalate, polysulfones, bisphenol A polycarbonate, polycarbonates, polyanhydrides, polyamides, and cellulose acetates. In addition, Polymer Handbook 2nd Edition J. Brandrup, E.H. Immergut (
J, Brandrup, E, Il, Immergut.
), published by John 1filey lk 5ons.
Synthetic polymers below 0 C are also useful.

The stiff polymer substances may be used alone or in combination, or may be used in combination as a copolymer. These polymers may also serve as a support applied to the photographic element described below, or may form a layer independent of the support.

In the present invention, the dye fixing element preferably has a dye fixing layer containing a mordant.

In the above case, the mordant can be arbitrarily selected from commonly used mordants, and among them, polymer mordants are particularly preferred. Here, the polymer mordant includes a polymer containing a tertiary amino group, a polymer having a nitrogen-containing heterocyclic moiety, a polymer containing these quaternary cation groups, and the like.

Preferred specific examples of homopolymers and copolymers containing one vinyl monomer unit having a tertiary amino group include the following. Numbers in thousands represent mol% (the same applies hereinafter).

Such.

Specific examples of homopolymers and copolymers containing one vinyl monomer unit having a tertiary imidazole group include U.S. Pat. Nos. 4,282,305 and 4,115,124;
No. 3,148゜061, JP-A-60-118834
The following may be mentioned, including the mordant described in No. 60-122941.

Such.

Preferred specific examples of homopolymers and copolymers containing one vinyl monomer unit having a quaternary imidazolium salt include British Patent No. 2,056.101, British Patent No. 2,093,
No. 041, No. 1,594,961, U.S. Patent No. 4,
No. 124.386, No. 4,115,124, No. 4
, No. 273,853, No. 4,450,224, JP-A No. 48-28325, and the like.

H3 Such.

In addition, as preferred specific examples of homopolymers and copolymers containing one vinyl monomer unit having a quaternary ammonium salt, U.S. Pat.
No. 98,088, No. 3,958,995, Japanese Unexamined Patent Publication No. 6
No. 0-57836, No. 60-60643, No. 60-1
No. 22940, No. 60-122942, No. 60-23
The following may be mentioned, including the mordant described in No. 5134.

shi6 fi13 Such.

Others, U.S. Patent No. 2,548,564, U.S. Patent No. 2.4
No. 84,430, No. 3,148゜161, No. 3,
Vinylpyridine polymers and vinylpyridinium cationic polymers disclosed in U.S. Pat. No. 756,814 and others; U.S. Pat.
9.096, British Patent No. 4,128,538, British Patent No. 1,277.453, etc. Polymer mordants capable of crosslinking with gelatin, etc.: US Patent No. 3,95
No. 8,995, No. 2.721,852, No. 2,7
No. 98,063, JP-A-54-115228, JP-A No. 54
Aqueous sol type mordant disclosed in No. 145529, No. 54-26027, etc.; U.S. Patent No. 3.898
Water-insoluble mordant disclosed in U.S. Pat.
No. 33) Reactive mordants capable of covalently bonding with dyes disclosed in the specification, etc.; and US Pat. No. 3.709.6
No. 90, No. 3,788,855, No. 3,642,
No. 482, No. 3,488,706, No. 3,557
, No. 066, No. 3゜271.147, No. 3,27
No. 1,148, JP-A-50-71332, JP-A No. 53-3
No. 0328, No. 52-155528, No. 53-125
No. 53-1024.

Others, U.S. Patent No. 2,675,316, U.S. Patent No. 2,8
Mention may also be made of the mordants described in US Pat. No. 82,156.

The molecular weight of the polymer mordant of the present invention is 1,000 to 1.0.
00,000 is appropriate, and special it: 10,000~
200.000 is preferred.

The above polymer mordant is usually used mixed with a hydrophilic colloid.

As the hydrophilic colloid, the same kind as the hydrophilic colloid for the back layer described above can be used, but gelatin is the most typical.

The mixing ratio of the polymer mordant and gelatin and the coating amount of the polymer mordant can be easily determined by those skilled in the art depending on the amount of dye to be mordant, the type and composition of the polymer mordant, and the image forming process to be used. Yes, but the mordant/gelatin ratio is 20/80 to 80/20 (weight ratio)
The appropriate amount of mordant to be applied is 0.2 to 15 g/rn', preferably 5 to 8 g/rn'.

The dye fixing layer may be composed of one layer or two or more layers. Further, an auxiliary layer other than the dye fixing layer may be provided above or below the dye fixing layer. In particular, it is preferable to provide a protective layer on top of the dye fixing layer containing a mordant to improve the strength of the image against mechanical manipulation.

The constituent layer on the dye fixing layer side of the dye fixing element of the present invention may contain a base or a base precursor as described above.

The amount of base or base precursor added is 0.1 to Log
/m2 is preferable.

In particular, when the photosensitive element contains a sparingly soluble metal compound as described later, the compound (complex-forming compound) that forms a complex with the metal ion constituting the sparingly soluble metal compound using water as a medium is used as a base precursor to form a dye-fixing element. A form in which it is added is preferable.

Complex-forming compounds tend to precipitate in the membrane when used as salts. To prevent precipitation, patent application 1876-1986
Polymers such as dextran and pullulan described in No. 00,
It is preferable to use a compound containing polyalkylene oxide described in Japanese Patent Application No. 60-206092.

Dextran and pullulan are types of polysaccharides and are polymers of D-glucose. The dextran used in the present invention preferably has a molecular weight of 20,000 to 2,000,000, particularly preferably 100,000 to 80,000. Also, pullulan starts from 20,000 yen.
2 million is preferred.

Examples of dextran and pullulan derivatives include those obtained by introducing sulfinic acid groups, amino groups, etc. into dextran and pullulan so that they can easily react with hardening agents.

The polyalkylene oxide or derivative thereof preferably has a molecular weight of at least 600, and is an alkylene oxide having 2 to 4 carbon atoms, such as ethylene oxide, propylene-1,2-oxide, butylene-1,2-oxide, etc.
- such as oxide, preferably ethylene oxide,
A condensate of a polyalkylene oxide consisting of at least 1o unit and a compound having at least one active hydrogen atom such as water, aliphatic alcohol, aromatic alcohol, fatty acid, organic amine, hexitol derivative, etc. Includes polyalkylene oxide block copolymers and the like. That is, examples of polyalkylene oxide compounds include polyalkylene glycols, polyalkylene gelyl alkyl ethers, polyalkylene glycol alkyl ethers, polyalkylene glycol (alkylaryl) ethers, polyalkylene glycol esters, and polyalkylene gelicol fatty acid amides. Polyalkylene glycol amines, polyalkylene gelicol block copolymers, polyalkylene gelicol graft polymers, and the like can be used.

The number of polyalkylene oxide chains is not limited to one in the molecule, but may be two or more. In that case, the lateral polyalkylene oxide chains are l.

It may consist of fewer alkylene oxide units, but the sum of alkylene oxide and units in the molecule must be at least 1o. If there is more than one polyalkylene oxide chain in the molecule, each of them may consist of different alkylene oxide units, such as ethylene oxide and propylene oxide. The polyalkylene oxide compound preferably contains from 14 to 100 alkylene oxide units.

The layer containing dextran, pullulan, derivatives thereof, or polyalkylene oxides may be any layer in the dye fixing element, but a layer containing a base and/or a base precursor is preferable, and in particular a layer containing a base and/or a base precursor is preferable. A layer containing a mordant is preferred.

The amount of dextran, pullulan and their derivatives or polyalkylene oxides used is 0.1-10g/
m2, preferably in the range 0.5-5 g/m2. This usage range is 0.1g/m
If it is less than 2, the present invention will not be effective, and if it exceeds 10 g/m2, the film quality will deteriorate.

Further, the (base and base precursor)/(dextran, pullulan and derivatives thereof or polyalkylene oxides) ratio (weight ratio) is preferably 0.1 to 10, preferably 0.2 to 5.

The bases used in the present invention include alkali metal or alkaline earth metal hydroxides, secondary
or tertiary phosphate, borate, carbonate, quinolinate, metaborate: ammonium hydroxide; hydroxide of quaternary alkyl ammonium; hydroxide of other metals, etc. Examples of bases include aliphatic amines (trialkylamines, hydroxylamines, aliphatic polyamines), aromatic amines (N-alkyl-substituted aromatic amines, N-hydroxylalkyl-substituted aromatic amines, and bis(p -(dialkylamino)phenyl)methanes), heterocyclic amines, amidines, cyclic amidines, guanidines, and cyclic guanidines, and those with a pKa of 8 or more are particularly preferred.

Also preferably used are salts of the above-mentioned organic bases and weak acids, such as carbonates, bicarbonates, borates, secondary and tertiary phosphates, quinolates, acetates, metaborates, and the like. In addition to these compounds, compounds described in JP-A-59-218443 are also preferably used.

Furthermore, there are various methods of generating a base using a base precursor, and all of the compounds used in these methods are useful as base precursors. For example, as described in Japanese Patent Application No. 60-169585, a base can be formed by mixing a metal compound that is sparingly soluble in water and a compound (referred to as a complex-forming compound) that undergoes a complex-forming reaction with the metal ions constituting the sparingly soluble metal compound. How to generate it and patent application 1986-
There is a method of generating a base by electrolysis as described in No. 74702.

The former method is particularly effective. Examples of poorly soluble metal compounds include carbonates, hydroxides, and oxides of zinc, aluminum, calcium, barium, and the like. Also,
Regarding complex-forming compounds, see, for example, N. E. Martell, R. M. Smith (A.E., Martell, R.
, M., Sm1th) co-author, “Critical Stability Constant”
ty Con5t, anLs), Volumes 4 and 5, Plenun Press. Specifically, aminocarboxylic acids, iminodiacetic acids, pyridylcarboxylic acids, aminophosphoric acids, carboxylic acids (mono, di, tri, and tetracarboxylic acids, as well as phosphono, hydroxy, oxo, esters,
Examples include compounds having substituents such as amide, alkoxy, mercapto, alkylthio, and phosphino), hydroxamic acids, polyacrylates, polyphosphoric acids, and salts of alkali metals, guanidines, amidines, or quaternary ammonium salts.

In the present invention, it is desirable that the poorly soluble metal compound and the complex-forming compound be contained in at least one layer on separate supports.

For example, it is preferable that the poorly soluble metal compound be contained in the light-sensitive material and the complex-forming compound be contained in the image-receiving material. Slightly soluble metal compounds are disclosed in JP-A-59-174830 and JP-A-53-102.
It is desirable to contain it as a fine particle dispersion prepared by the method described in No. 733 etc., and the average particle size is 50 μm.
Below, 5 micrometers or less is especially preferable.

In the present invention, when a poorly soluble metal compound or a complex-forming compound is contained in a layer on a support, the amount added depends on the type of compound,
Although it depends on the particle size of the poorly soluble metal compound, the rate of complex formation reaction, etc., it is appropriate to use the coating film in an amount of 50% by weight or less, more preferably 0.01% to 40% by weight. % ranges are useful.

The content of the complex-forming compound in the present invention is 1/100 to 100 times the content of the poorly soluble metal compound in molar ratio.
It is preferably 1/10 to 20 times.

Other base precursors include salts of organic acids and bases that decompose by carbonation when heated, and compounds that decompose and release amines through reactions such as intramolecular nucleophilic substitution, Rossen rearrangement, and Beckmann rearrangement. Compounds that release a base by causing some kind of reaction, and compounds that generate a base by electrolysis or the like are preferably used.

Preferred base precursors of the former type that generate a base upon heating include salts of trichloroacetic acid described in British Patent No. 998.949, etc., and U.S. Patent No. 4,060,4.
Salt of α-sulfonylacetic acid described in No. 20, JP-A-59-
Salts of propiolic acids described in US Pat. No. 180537, 2-carboxycarboxamide derivatives described in US Pat. No. 4,088,496, thermally decomposable acids using an alkali metal or alkaline earth metal in addition to an organic base as the base component (JP-A-59-195237), hydroxamic carbamates described in JP-A-59-168440 using Rossen rearrangement, and JP-A-59 that produces nitriles by heating.
- aldoxime carbamates described in ts7s37-q and the like. Others, British Patent No. 988,9
No. 45, U.S. Patent No. 3゜220.846, Japanese Unexamined Patent Publication No. 1973
Base precursors described in No. 22625, British Patent No. 2,079,480, and the like are also useful.

The following compounds can be mentioned as compounds that generate bases by electrolysis.

For example, electrolysis of various fatty acid salts can be cited as a typical method using electrolytic oxidation.

Through this reaction, carbonates of alkali metals and organic bases such as guanidines and amidines can be obtained extremely efficiently.

In addition, methods using electrolytic reduction include the production of amines by reduction of nitro and nitroso compounds; production of amines by reduction of nitriles: nitro compounds, azo compounds,
Examples include the production of p-aminophenols, p-phenylenediamines, and hydrazines by reduction of azoxy compounds and the like. p-aminophenols, p-
In addition to being used as bases, phenylene diamines and hydrazines can also be used directly as color image forming substances.

Of course, it is also possible to generate an alkaline component by electrolyzing water in the coexistence of various inorganic salts.

Although the base can be supplied or generated by various methods as described above, the present invention is particularly effective when the base or base precursor is present in the form of a salt in the dye fixing layer or the layer adjacent thereto.

A polymer latex may be present in the constituent layer or back layer on the side of the dye fixing layer of the dye fixing element of the present invention for the purpose of improving the brittleness of the mordant layer and further improving the curl balance.

Examples of monomers constituting the polymer latex used in the present invention include acrylic esters, methacrylic esters, crotonic esters, vinyl esters, maleic acid esters, fumaric acid diesters, itaconic acid diesters, acrylamides, and methacrylamides. Examples include vinyl ethers, styrenes, etc. More specific examples of these monomers include acrylic esters such as methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, Lert-butyl acrylate, hexyl acrylate, 2- Ethylhexyl acrylate, acetoxyethyl acrylate, phenyl acrylate, 2-methoxy acrylate, 2-ethoxy acrylate, 2-(2
-methoxyethoxy)ethyl acrylate and the like. Examples of the methacrylic acid ester include methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, n-butyl methacrylate, tCrt-butyl methacrylate, cyclohexyl methacrylate, 2-hydroxyethyl methacrylate, and 2-ethoxyethyl methacrylate. Examples of crotonate esters include butyl crotonate, hexyl crotonate, and the like. Examples of the vinyl ester include vinyl acetate, vinyl propionate, vinyl butyrate, vinyl methoxy acetate, vinyl benzoate, and the like.
Examples of maleic acid diesters include diethyl maleate, dimethyl maleate, dibutyl maleate, and the like. Examples of fumaric acid diesters include diethyl fumarate, dimethyl fumarate, and dibutyl fumarate.
Examples of itaconic acid diesters include diethyl itaconate, dimethyl itaconate, dibutyl itaconate, and the like. Acrylamides include acrylamide, methylacrylamide, ethylacrylamide, propylacrylamide, n-butylacrylamide, and Lert-
Examples include butylacrylamide, cyclohexylacrylamide, 2-methoxyethylacrylamide, dimethylacrylamide, diethylacrylamide, phenylacrylamide, and the like. Examples of methacrylamide include methyl methacrylamide, ethyl methacrylamide, n
-butylmethacrylamide, tert-butylmethacrylamide, 2-methoxymethacrylamide, dimethylmethacrylamide, diethylmethacrylamide, and the like. Vinyl ethers include methyl vinyl ether, butyl vinyl ether, hexyl vinyl ether,
Examples include methoxyethyl vinyl ether and dimethylaminoethyl vinyl ether. Styrenes include styrene, methylstyrene, dimethylstyrene, trimethylstyrene, ethylstyrene, isopropylstyrene, butylstyrene, chloromethylstyrene, methoxystyrene, butoxystyrene, acetoxystyrene, chlorstyrene, dichlorostyrene, bromstyrene, and vinylbenzoin. Examples include acid methyl ester, 2-methylstyrene, and the like. These monomers may be homopolymers or copolymers, depending on the purpose of the invention. Preferred are acrylic esters, copolymers of acrylic esters and methacrylic esters, and copolymers of acrylic esters and acrylic acid or methacrylic acid. The average molecular weight is preferably 100,000 or more, especially 30
It is between 10,000 and 500,000.

Polymer latex can be produced in a variety of ways. Free radical polymerization of ethylenically unsaturated solid monomers can be carried out by thermal decomposition of chemical initiators or by the action of reducing agents on oxidizing compounds (redox initiators) or by physical action such as ultraviolet light or other high-energy radiation, radiofrequency, etc. It is initiated by the addition of free radicals to monomer molecules that are formed. The main chemical initiators are persulfates (ammonium and potassium versalphate),
Hydrogen peroxide, 4'4'-azobis(4-cyanovaleric acid) etc. (which are water soluble), azoisobutyronitrile, benzoyl peroxide, chlorobenzoyl peroxide and other compounds (which are water soluble). ). Common redox initiators include hydrogen peroxide-iron(II) salts, potassium persulfate-potassium bisulfate,
Examples include cerium salt alcohol. Examples of initiators and their effects are given by F. A. Bovay, Emulsion P.
olymerization J Intersc
ience Publishers Inc., New Y
Ork, 1955, pages 59-93. As the emulsifier, a surface-active compound is used, and preferred examples include soaps, sulfonates and sulfates, cationic compounds, amphoteric compounds, and polymeric protective colloids. Examples of these groups and their effects can be found in Be1g1sche Gchemische Indu
Strie Vol. 28, pp. 16-20 (1963).

Specific examples of the polymer latex used in the present invention are described below, but the present invention is not limited thereto.

The polymer latex used as the above additive is an aqueous dispersion of a water-insoluble polymer with an average particle size of 20 μm to 200 μm, and the preferred amount used is 0 in dry weight ratio to the hydrophilic colloid binder. It is preferably .01 to 2.0, particularly preferably 0.1 to 1.0.

Further, among the above, those having a low glass transition point (especially 40° C. or lower) are preferable for improving the brittleness of the dye fixing layer.

The constituent layer or back layer on the side where the dye fixing layer of the dye fixing element of the present invention is located has improved slip properties, improved adhesion resistance, improved peelability between the dye fixing element and the photosensitive element, and improved brittleness of the mordant layer. , oil droplets may be present for the purpose of further improving curl balance.

In the present invention, oil droplets refer to liquid particles that are an oily independent system finely dispersed in a hydrophilic colloid and are substantially insoluble in water. The finer the size of the oil droplets, the better, preferably an average particle size of 3 μm or less, particularly 1 μm or less, and even 0.5 μm or less.

The oil droplets in the present invention are, for example, U.S. Pat. No. 2.322,
No. 027, No. 2.533,514, No. 2.882
, No. 157, Special Publication No. 46-23233, British Patent No. 9
No. 58,441, No. 1,222,753, Japanese Unexamined Patent Publication No. 1973
No. 0-82078, U.S. Patent No. 2,353,262,
3,676.142, 3,600.454, JP-A-51-28921, JP-A-51-141623
Esters (e.g., phthalate esters, phosphoric acid esters, fatty acid esters, etc.), amides (e.g., fatty acid amides, sulfamides, etc.), and ethers described in Japanese Patent Application No. 148489/1989, etc. , alcohols, paraffins, silicone oil, and other high-boiling organic solvents that are liquid at room temperature and do not evaporate at heat treatment temperatures are preferred.

Furthermore, oil droplets also include those that are solid when used alone, but when two or more of them are used in combination, the melting point is lowered and the droplets become liquid in the coating film.

Oil droplets also include those that are solid at room temperature, but exist as liquid droplets when incorporated into a hydrophilic binder or when incorporated with various photographic additives.

Examples include stilbene, triazine, oxazole, and coumarin compounds used as whitening agents, and benzotriazole, thiazoline, and cinnamic acid ester compounds used as ultraviolet absorbers.

Oil droplets suitable for use in the present invention are saturated or unsaturated hydrocarbons having 10 or more carbon atoms (including those in which some or all of the hydrogen atoms are replaced with halogen atoms), or the following general formula (^ ) to (G).

General formula (8) General formula (B) General formula (C) General formula (D) General formula (E) (R0-)-P=0 General formula (F) Binary formula (G) RG-COOR-R”2 [In the above general formula (A), R1 represents an m+n-valent substituted or unsubstituted aliphatic hydrocarbon group, and R21 represents a substituted or unsubstituted aliphatic hydrocarbon group, an alicyclic hydrocarbon group, or an aromatic It represents a hydrocarbon group, and m and n each represent an integer of 1 to 5.

In the above general formula (B), R5 represents a p+q-valent substituted or unsubstituted aliphatic hydrocarbon group or alicyclic hydrocarbon group, and R22 and R23 may be the same, and each is substituted or unsubstituted. represents an aliphatic hydrocarbon group or alicyclic hydrocarbon group, p represents Oll, 2 or 3, q represents 0.1.2 or 3, p+q represents 1
That's all.

In the above general formula (C), R6 is a hydrogen atom, a substituted or unsubstituted aliphatic hydrocarbon group, alicyclic hydrocarbon group, aromatic hydrocarbon group, acyl group, amino group, acyloxy group, carbamoyl group, ureido group, an alkoxycarbonyl group, an aryloxycarbonyl group, or a cycloalkyloxycarbonyl group, or a halogen atom, a hydroxyl group, a carboxyl group, a nitro group, or a cyano group.

R24 represents a substituted or unsubstituted aliphatic hydrocarbon group, alicyclic hydrocarbon group or aromatic hydrocarbon group.

r represents an integer from 1 to 5, S represents an integer from 1 to 4, and r+s is 6 or less.

When r is 2 or more, Rc may be the same or different.

When S is 2 or more, R24 may be the same or different.

In the above general formula (D), R and R26 each represent a substituted or unsubstituted alkyl group, a monocyclic to polycyclic alicyclic hydrocarbon group, an aryl group, or an aralkyl group.

R27 represents a substituted or unsubstituted alkyl group, aryl group, aralkyl group, or amino group, or a halogen atom. 2 represents an atomic group for forming a carbon ring condensed to the benzene ring.

U represents 0 or 1. (2) represents an integer from 0 to 2, W represents an integer from 0 to 7, and V+W is 7 or less.

RO- and/or R are substituted on the benzene ring and/or condensed carbon ring in the above general formula (D).

In the above general formula (F,), R28 represents a substituted or unsubstituted alkyl group, cycloalkyl group, alkenyl group or aryl group.

R28 may be the same or different.

In the above general formula (F), R29 is a hydrogen atom or n
' represents a substituted or unsubstituted aliphatic hydrocarbon group.

R and R31 each represent a hydrogen atom or a substituted or unsubstituted aliphatic hydrocarbon group or aromatic hydrocarbon group, and R30 and R31 may be the same or different.

R29 and R30 and R30 and R31 may be linked to each other to form a petero ring.

n' represents 1 or 2.

In the above general formula (G), R6 represents a substituted or unsubstituted aliphatic hydrocarbon group, and R3 represents a substituted or unsubstituted aliphatic hydrocarbon group, alicyclic hydrocarbon group, or aromatic hydrocarbon group. . ) Detailed explanations of the above general formulas (8) to (G) can be found in JP-A-59
-178455, 59-178454, 59-
No. 178452, No. 59-178453, No. 59-1
It is described in No. 78451, No. 59-1.78457, etc.

Specific examples of compounds used to form oil droplets are listed below.

(1) Liquid paraffin (2) Chlorinated paraffin C101-121 ca HI7 0OR1 Furthermore, as an example of the compound of formula (A) of the present invention, Oil and Fat Chemistry Handbook (revised 2nd edition) 1971 (Maruzen), 108-11
Page 5, (Table 2-31.2-34.2-36.2-3
9.2-47).

(+3) C13H27COOCIBH37-is.

(32) CC4H9oe-p=.

(34) (Ca HI70up=.

IJf'Ishi4 t'19-n (43) Rheophos ■50 (manufactured by Ajinomoto Co., Inc.) (44) Rheophos ■65 (manufactured by Ajinomoto Co., Inc.) (45) Rheophos A3 Saku5 (manufactured by Ajinomoto Co., Inc.) (46) Rheophos ■110 (manufactured by Ajinomoto Co., Inc.) These compounds are known and can be obtained as commercial products or can be easily synthesized by known synthesis methods.

Further, silicone oils particularly preferably used in the present invention include all silicone oils from dimethyl silicone oil to modified silicone oils in which various organic groups are introduced into dimethylsiloxane.

A particularly preferred silicone oil used in the present invention is represented by the following general formula (I).

General formula (I) General formula CI) includes a linear siloxane having a siloxane unit represented by the following general formula (I-1) and a terminal group represented by the following general formula (I-2).

General formula (I-13) General formula (I-2) CH3 In the formula, R1 is a hydrogen atom, an alkyl group, a substituted alkyl group,
Represents a cycloalkyl group, aryl group, substituted aryl group, alkoxy group, substituted alkoxy group, alkoxycarbonyl group, or substituted alkoxycarbonyl group, 2 is 0
Or a number greater than or equal to 1, m is a number greater than or equal to 1, ffi+m is 1
represents the number from 1000 to 1000.

In general formula (I), R1 may be the same type or two or more different types. That is,
The silicone oil represented by general formula (I) may be composed of siloxane units of general formula (I-1) consisting of the same type of R1, or may be composed of two or more types of general formula (I-1) with different types of R1. -1) may be composed of the siloxane unit.

- In general formula (I), R1 is preferably a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, a substituted alkyl group,
Cycloalkyl group, aryl^, substituted aryl group, alkoxy group, substituted alkoxy group, alkoxycarbonyl group or substituted alkoxycarbonyl group. f
L+m is preferably 2-500.

Specific examples of R1 in the compound represented by general formula (I) include -CH3, -c5H,l, -C1]HI7, -CI
3H27, -CIII 829, -CH2CN2) lGII2) 30 (02H40) (C3Hs 0
) bR2 (where R2 is an alkyl group, a and b represent integers of 0 or 1 or more), -(C112) 30H5-(CN2) 3 NN2,
-(C112) 3 NHCH2CH2N112, -
(CH2)30CH2CIHH2,N1-((:112)3SH,-((:N2
) 3 C00H1-((:N2) s
(:0011, -(CH2) 10 C00H5-
(CH2) 3 C0NHR2 (R2 has the same meaning as above),
-(:112 CH2cps, -CH2CI2
C6F 13, -(C112) 3 ON.

-(Plow) 3i◇ -(CI+2) 30CH2i) -(Cllz) 30R2 (R2 has the same meaning as above), -
〇, (Koichi ■, -0C113, -oca H17, -0CI
I2CII20(c2o4o) a(c3u,o) b
L (a, b, R2 have the same meanings as above), and the like.

Among the silicone oils represented by the general formula (I), those represented by the following general formula (n) or (III) are particularly preferred.

General formula (n) General formula (III) In the formula, R1' is -CH3 or R1 of the general formula (1)
ρ is 0 or a number of 1 or more, q is a number of 1 or more, and a is a number of 1 to 17.

In the general formula (l and (I[+)), the carboxyl equivalent (carboxyl equivalent is the value obtained by dividing the molecular weight by the number of carboxyl groups contained therein) is 120
~6000 is preferred, particularly preferably 120~
It is 4000.

Next, among the compounds represented by the general formula (I), typical examples used in the present invention will be listed, but the invention is of course not limited to these.

-I ■-5 ■-10 υ■ ■-11 ■-12 ■-13 Knee 14 Knee 15 Knee 16 Knee 19 Knee 20 ■-21 ■-22 Knee 23 Knee 24 ■-25 Knee 27 Knee 28 Knee 29 ■- 30 ■-31 Knee 32 to Knee 38 Positive -■--1- I-3291 I-34+5 1 I-36405 I-378010 r -38802 Knee 39 The method for producing the compound of general formula (I) is known, and the present invention Many of the silicone oils used in the invention are commercially available.

For example, the product names of Shin-Etsu Chemical ■, KF410, F41
2, F413, F351.

KF945, KF615, K851. X-22
-819, FLloo, KF862, KF865
, X-22-980, FlooT, X-60=
164, X-22-3710, X-22-3715, F-910, x-22-160B, etc.

Various known methods can be used to form oil droplets, but as a typical example, the above-mentioned compounds are dissolved in a low-boiling organic solvent such as methyl acetate or ethyl acetate as needed, and a surface-active An example of a method is to mix the agent with an aqueous solution of a hydrophilic colloid such as gelatin, stir to emulsify and disperse it, and then add this dispersion to a coating solution for a hydrophilic colloid layer and apply it.

The number of oil droplets is 5 to 60 with respect to the total amount of polymer components in the additive layer.
vol, %, especially 10-50 vol. It is preferable to add %.

There are no particular restrictions on the hardening agent used in the dye fixing layer, back layer, and other constituent layers of the dye fixing element of the present invention, and known hardeners such as aldehydes (formaldehyde,
glyoxal, geltaraldehyde, etc.), N-methylol compounds (dimethylol urea, methylol dimethylhydantoin, etc.), dioxane derivatives (2,3-dihydroxydioxane, etc.), activated vinyl compounds (1,
3,5-)acryloyl-hexahydro-s-triazine, bisvinylsulfonyl) methyl ether, N,
N'-ethylene-bis(vinylsulfonylacetamide), N,N'-trimethylene-bis(vinylsulfonylacetamide), etc.], active halogen compounds (2,4-
dichloro-6-hydroxy-5-) riazine, etc.), mucohalogen acids (mucochloric acid, mucophenoxychloroic acid, etc.), isoxazoles, dialdehyde starch,
1-chloro-6-hydroxytriazinylated gelatin,
Mention may be made of epoxy compounds such as, for example. The amount of the hardener to be added is arbitrary, but the appropriate amount is usually about 0.1 to 30 wt % of the hydrophilic colloid which is the binder and reacts with the hardener.

In addition, various additives can be used in the dye fixing element of the present invention. Examples include coating aids, antistatic agents, antifoggants, development stoppers, antifading agents, ultraviolet absorbers, and optical brighteners.

In addition, in order to prevent the transferred dye from being retransferred from the dye fixing element to the outside, a polymer having an anionic group (
For example, Sumikagel (trade name, manufactured by Sumitomo Chemical Co., Ltd.) may be added to the protective layer.

In addition, compounds such as higher alkyl sodium sulfate, higher fatty acid higher alcohol ester, carbowax, higher alkyl phosphate ester, and silicone compounds are added to the protective layer and back layer for the purpose of improving slipperiness, peelability, and adhesion resistance. May be used. In particular, U.S. Pat. No. 2,882,157, U.S. Pat.
The compounds described in JP-A-51-141623 and the like may be used alone or in combination of two or more.

Fluorosurfactants described in Japanese Patent Application No. 61-267492 can also be used for the same purpose.

It is also effective to use a fluorescent whitening agent described in JP-A-61-143752 and to adjust the amount of a white pigment such as titanium oxide to improve the whiteness.

The support used in the dye-fixing element of the invention is one that can withstand the processing temperatures. Common supports include glass, paper, metal and their analogs, as well as cellulose acetate film, cellulose ester film, polyvinyl acetal film, polystyrene film, polycarbonate film,
Includes polyethylene terephthalate films and their related films or plastic materials.
Paper supports laminated with polymers such as polyethylene can also be used.

In the present invention, the effects of the present invention are exhibited when a plastic film having a thickness of 50 to 200 μm, particularly 80 to 150 μm is used as the support. And 8
The effect is particularly great when the plastic film is transparent and has a thickness of 0 to 150 μm and is used for an overhead projector (OHP).

In the present invention, the photosensitive element used in combination with the dye-fixing element described above has at least a photosensitive silver halide, a dye-donating substance, a binder, and, if necessary, an organic silver salt and a reducing agent on a support. .

Silver halides that can be used in the present invention include silver chloride, silver bromide,
Alternatively, silver chlorobromide, silver chloroiodide, or silver chloroiodobromide may be used.

Specifically, U.S. Patent No. 4,500,626, column 50, Research Disclosure June 1987 issue 9.
Page to page lo (RD17029), JP-A-61-1072
No. 40, Patent Application No. 60-225176, No. 60-228
．． Any of the silver halide emulsions described in No. 267 and the like can be used.

The silver halide emulsion used in the present invention may be of the surface latent image type in which latent images are mainly formed on the grain surfaces, or may be of the internal latent image type in which the latent images are formed inside the grains. It may also be a so-called core-shell emulsion in which the inside of the grain and the surface layer of the grain have different phases. Further, in the present invention, a direct reversal emulsion in which an internal latent image type emulsion and a nucleating agent are combined can also be used.

Silver halide emulsions may be used as they are after ripening, but they are usually used after being chemically sensitized. For emulsions for conventional light-sensitive materials, known sulfur sensitization methods, reduction sensitization methods, noble metal sensitization methods, etc. can be used alone or in combination. These chemical sensitizations can also be carried out in the presence of nitrogen-containing heterocyclic compounds (JP-A-58-126526, JP-A-58-215644).
issue).

The coating amount of the photosensitive silver halide used in the present invention is in the range of I B to 10 g/rn' in terms of silver.

In the present invention, an organic metal salt can also be used as an oxidizing agent together with photosensitive silver halide. In this case, the photosensitive silver halide and the organic metal salt need to be in contact or at a close distance.

Among such organic metal salts, organic silver salts are particularly preferably used.

Examples of organic compounds that can be used to form the above-mentioned organic silver salt oxidizing agent include compounds described in JP-A-61-107240 and U.S. Pat. No. 4,500,626, columns 52wA to 53. .

Also useful are silver salts of carboxylic acids having an alkynyl group, such as silver phenylpropiolate described in Japanese Patent Application No. 113235/1982, and silver acetylene described in Japanese Patent Application No. 90089/1982. Two or more types of organic silver salts may be used in combination.

The above-mentioned organic silver salts contain, per mol of photosensitive silver halide,
0.01 to 10 mol, preferably 0.01 to 1
Moles can be used together. The total coating amount of photosensitive silver halide and organic silver salt is 50 mg to 10 g in terms of silver.
/rn' is appropriate.

The silver halide used in the present invention may be spectrally sensitized with methine dyes and others.

The dyes used include cyanine dyes, merocyanine dyes, complex cyanine dyes, complex merocyanine dyes, holopolar cyanine dyes, hemicyanine dyes, styryl dyes and hemioxonol dyes.

Specifically, Japanese Patent Publication Nos. 59-180550 and 60-1
No. 40335, Research Disclosure Magazine 197
The sensitizing dyes described in June 1988 issue, pages 12-13 (RD17029), JP-A No. 0-111239, Japanese Patent Application No. 6
Examples include thermally decolorizable sensitizing dyes described in No. 0-172967 and the like.

These sensitizing dyes may be used alone or in combination, and combinations of sensitizing dyes are often used particularly for the purpose of supersensitization.

Along with the sensitizing dye, it is a dye that itself does not have a spectral sensitizing effect or a substance that does not substantially absorb visible light,
Substances exhibiting supersensitization may also be included in the emulsion (e.g., U.S. Pat. Nos. 2,933,390 and 3,635,72).
No. 1, No. 3,743,510, No. 3.615,6
No. 13, No. 3,615,641, No. 3゜617.
No. 295 and No. 3,635,721).

These sensitizing dyes may be added to the emulsion during or before or after chemical ripening.
It may be carried out before or after nucleation of silver halide grains according to No. 756 and No. 4,225.666.

The amount added is generally about 10@-8 to 10' mol per mol of silver halide.

In the present invention, when silver ions are reduced to silver under high temperature conditions, a compound that generates or releases a mobile dye in response to or inversely to this reaction is used as an image-forming substance, that is, a dye. It can contain a donating substance.

Examples of the dye-donating substances used in the present invention include:
Compounds that form pigments by oxidative coupling reactions (
couplers). This coupler is 4
It may be an equivalent coupler or a 2-equivalent coupler. Also,
Two-equivalent couplers that have a diffusion-resistant group as a leaving group and form a mobile (diffusible) dye through an oxidative coupling reaction are also preferred. Specific examples of developers and couplers can be found in "The Theory of the Photographic Process" by James, 4th edition (T.

H, James The Theory of th
e Photographic Process'')29
1-334 pages, and 354-361 pages, Japanese Patent Application Laid-open No. 1983-
No. 123533, No. 5B-149046, No. 58-1
No. 49047, No. 59-111148, No. 59-12
No. 4399, No. 59-174835, No. 59-231
No. 539, No. 59-231540, No. 60-2950
No. 60-2951, No. 60-14242, No. 6
It is described in detail in No. 0-23474, No. 60-66249, etc.

Another example of the dye-donating substance is a compound that has the function of releasing or diffusing a diffusible dye in an imagewise manner. This type of compound can be represented by the following general formula (LI).

(Dye-X)H-Y (LI)Dye
represents a dye group, a temporarily shortened dye group or a dye precursor group, X represents a simple bond or a connecting group,
Y corresponds to or inversely corresponds to the photosensitive silver salt having a latent image in image form, and causes a difference in the diffusivity of the compound represented by (Dye-X)n-Y, or releases Dye and releases it. (Dye
e-X may be the same or different.

As a specific example of the dye-donating substance represented by the general formula (Ll), for example, a dye developer in which a hydroquinone developer and a dye component are linked is disclosed in U.S. Patent No. 3,134,764.
No. 3,362.819, No. 3,597,20
No. 0, No. 3,544,545, No. 3,482,9
It is described in No. 72, etc. In addition, a substance that releases a diffusible dye through an intramolecular nucleophilic substitution reaction is disclosed in U.S. Patent No. 3,9
80,479 etc., a substance that releases a diffusible dye through an intramolecular rewinding reaction of the isoxacilone ring was disclosed in JP-A No. 4.
No. 9-111.628, etc.

Another example is to make a dye-releasing compound into an oxidized form without dye-releasing ability, coexist with a reducing agent or its precursor, and after development, reduce it with the reducing agent that remains unoxidized to produce a diffusible dye. A method of releasing dye has also been devised, and a specific example of the dye-donating substance used therein is disclosed in Japanese Patent Application Laid-Open No. 53
-110,827, 54-130,927, 5
It is described in No. 6-164,342 and No. 53-35.533. Japanese Patent Application No. 60-244.873 describes a compound that releases a diffusible dye when the N-0 bond is cleaved by the remaining reducing agent as a dye-donating substance that releases a diffusible dye using a similar mechanism. has been done.

Furthermore, as described in JP-A-59-185333, a donor-acceptor reaction occurs in the presence of a base and releases a diffusible dye, but when it reacts with an oxidized form of a reducing agent, dye release does not substantially occur. Non-diffusible compounds (LDA compounds) can also be used.

In all of these methods, the diffusible dye is released or diffused in areas where development has not occurred, and the dye is neither released nor diffused in areas where development has occurred.

On the other hand, as a substance that releases a diffusible dye in the area where development occurs, it is a coupler that has a diffusible dye as a leaving group and that releases a diffusible dye by reaction with an oxidized form of a reducing agent (DDR coupler). However, British Patent No. 1,330.52
No. 4, Special Publication No. 4B-39,165, British Patent No. 3゜4
No. 43.940, etc., and is preferably used in the present invention.

In addition, in methods using these reducing agents, image contamination due to oxidative decomposition products of the reducing agent may become a problem. Dye-releasing compounds (DRR compounds) have also been devised and are also advantageously used in the present invention. Typical examples are U.S. Pat. No. 3,928,312, U.S. Pat.
No. 053,312, No. 4,055゜428, No. 4
, No. 336, 322, JP-A No. 59-65839, No. 5
No. 9-69839, No. 53-3819, No. 51-10
No. 4,343, Research Disclosure Magazine 174
No. 65, U.S. Patent No. 3,725,062, U.S. Patent No. 3.7
No. 28,113, No. 3,443,939, Japanese Unexamined Patent Publication No. 1973
It is a dye-donating substance described in No. 8-116,537, No. 57-179840, U.S. Pat. Specific examples of this type of dye-donating substance include the compounds described in columns 22 to 44 of the above-mentioned U.S. Pat. No. 4,500,626; Compound (1) ~ (:])
, (10) to (13), (I6) to (19), (28
)~(30), (33)~(35), (38)~(
40), (42) to (64) are preferred. Compounds described in JP-A-61-124941 are also useful.

In addition, as a dye-donating substance other than those mentioned above, a dye silver compound in which an organic silver salt and a dye are combined (Research Disclosure magazine, May 1978 issue, pages 54-58, etc.)
, azo dyes used in heat-developable silver dye bleaching methods (U.S. Pat. No. 4,235.957, Research Disclosure, April 1976 issue, pages 30-32, etc.), leuco dyes (U.S. Pat. No. 3,985) , No. 565, 4,022,
617 etc.) can also be used.

The amount of the dye-donating substance added is 0.01 to 10 mmol/
m2, preferably 0.03-5 mmol/m2 is suitable.

Hydrophobic additives such as the dye-releasing compounds described above and the imaging promoters described below are disclosed in U.S. Pat.
They can be incorporated into the layers of the photosensitive element by known methods such as the method described in No. 7. In this case, JP-A-59
No. -83154, No. 59-178451, No. 59-1
No. 78452, No. 59-178453, No. 59-17
No. 8454, No. 59-178455, No. 59-178
A high boiling point organic solvent such as that described in No. 457 may be used in combination with a low boiling point organic solvent having a boiling point of 50° C. to 160° C., if necessary.

The amount of the high-boiling organic solvent is 10 g or less, preferably 5 g or less, per 1 g of the dye-providing substance used.

Also, Japanese Patent Publication No. 51-39853, Japanese Patent Publication No. 51-5994
The dispersion method using a polymer described in No. 3 can also be used.

In the case of a compound that is substantially insoluble in water, it can be dispersed and contained in the binder in the form of fine particles other than the feeding method.

Various surfactants can be used when dispersing hydrophobic substances into hydrophilic colloids.

For example, Nos. (37) to (3) of JP-A No. 59-157636.
The surfactants listed on page 8) can be used.

In the present invention, it is desirable to contain a reducing substance in the photosensitive element. Reducing substances include those generally known as reducing agents, as well as the aforementioned dye-donating substances having reducing properties.

Also included are reducing agent precursors that do not themselves have reducing properties but develop reducing properties through the action of nucleophiles and heat during the development process.

Examples of reducing agents used in the present invention include U.S. Pat.
, No. 49-5° of No. 500,626, No. 4,483 of the same.
, No. 914, columns 30-31, JP-A-60-14033
No. 5, pages (17) to (18), JP-A-1284-1984
No. 38, No. 60-128436, No. 60-12843
Reducing agents described in No. 9, No. 60-128437, etc. can be used. Also, JP-A-56-138736 and JP-A-57
Reducing agent precursors described in US Pat. No. 4,330,617 and the like can also be used.

Combinations of various reducing agents can also be used, such as those disclosed in US Pat. No. 3,039,869.

In the present invention, the amount of reducing agent added is 0 per mole of silver.
．． 01 to 20 mol, particularly preferably 0.1 to 10 mol.

In the present invention, a compound that activates development and simultaneously stabilizes images can be used in the photosensitive element. For specific compounds preferably used, see U.S. Patent Nos. 4 and 5.
No. 00,626, Nos. 51 to 52 wA.

Various antifoggants or photographic stabilizers can be used in the present invention. Examples include Research Disclosure magazine, December 1978 issue 24-2.
Azoles and azaindenes described on page 5, JP-A-59
Nitrogen-containing carboxylic acids and phosphoric acids described in Japanese Patent Application No. 168442, or mercapto compounds and metal salts thereof described in JP-A-59-111636, Japanese Patent Application No. 60-22
Acetylene compounds such as those described in No. 8267 are used.

In the present invention, the photosensitive element may contain an image toning agent if necessary. Specific examples of effective toning agents include compounds described in JP-A-61-147244.

In order to obtain a wide range of colors in the chromaticity diagram using the three primary colors yellow, magenta, and cyan, it is necessary to use a light-sensitive element having at least three silver halide emulsion layers each sensitive to a different spectral region. good. For example, there are combinations of three layers such as a blue-sensitive layer, a green-sensitive layer, and a red-sensitive layer, and a combination of a green-sensitive layer, a red-sensitive layer, and an infrared-sensitive layer. Each of these photosensitive layers may be divided into two or more layers, if necessary.

The photosensitive element used in the present invention may contain various additives known for use in heat-developable photosensitive elements and layers other than the photosensitive layer, such as a protective layer, an intermediate layer, an antistatic layer, an antihalation layer, and a dye fixing layer. It can have a non-peelable layer, a matte layer, etc. to facilitate peeling from the element. Various additives are listed in Research Disclosure Magazine, 1978, 6.
Plasticizers, matting agents, sharpness-improving dyes, antihalation dyes, surfactants, optical brighteners, anti-slip agents, etc. described in Japanese Patent Application Laid-open No. 61-88256, pages 9 to 15 of the Monthly issue, There are additives such as antioxidants and anti-fading agents.

In particular, the protective layer usually contains an organic or inorganic matting agent to prevent adhesion. Further, this protective layer may contain a mordant and an ultraviolet absorber. Each of the protective layer and the intermediate layer may be composed of two or more layers.

Further, the intermediate layer may contain a reducing agent to prevent color fading and color mixing, an ultraviolet absorber, and a white pigment such as titanium dioxide. A white pigment may be added not only to the intermediate layer but also to the emulsion layer for the purpose of improving sensitivity.

In the present invention, an image formation accelerator can be used in the photosensitive element and/or the dye fixing element. Image formation promoters include promoting redox reactions between silver salt oxidizing agents and reducing agents;
It has functions such as promoting reactions such as generation of dye from dye-donating substance, decomposition of dye, and release of diffusible dye, and promotion of movement of dye from the light-sensitive element layer to the dye fixing layer. The functions include bases or base precursors, nucleophilic compounds, high-boiling organic solvents (oils), thermal solvents,
It is classified as a surfactant, a compound that interacts with silver or silver ions, etc. However, these substance groups generally have multiple functions and usually have some of the above-mentioned promoting effects. For details on these, please refer to JP-A-61
-93451.

In the present invention, various development stoppers can be used in the photosensitive element and/or dye fixing element in order to always obtain a constant image despite fluctuations in processing temperature and processing time during development.

The development stopper referred to here is a compound that neutralizes the base immediately after proper development or reacts with the base to lower the base concentration in the film and stop development, or a compound that inhibits development by interacting with silver and silver salts. It is a compound that Specifically, examples include acid precursors that release acids when heated, electrophilic compounds that undergo a substitution reaction with coexisting bases when heated, nitrogen-containing heterocyclic compounds, mercapto compounds, and their precursors (for example, No. 60-108837, No. 60-1
No. 92939, No. 60-230133 or No. 60-
Compounds described in No. 230134 and the like. ) Compounds that release mercapto compounds upon heating are also useful; for example, JP-A-61-67851, JP-A-61-61-
No. 147244, No. 61-124941, No. 61-1
No. 85743, No. 61-182039, No. 61-18
No. 5744, No. 61-184539, No. 61-188
There are compounds described in No. 540 and No. 61-53632.

A hydrophilic binder can be used for the photosensitive element and/or dye fixing element of the present invention. As the hydrophilic binder, the hydrophilic colloid mentioned in the above-mentioned back layer can be used.

In the present invention, the binder is applied in an amount of 20 g or less per m2, preferably 10 g or less, more preferably 7 g or less.

The ratio of the high boiling point organic solvent dispersed in the binder together with a hydrophobic compound such as a dye-donating substance and the binder is 1 cc or less of solvent per 1 g of binder, preferably 0.
．． A suitable amount is 5 cc or less, more preferably 0.3 cc or less.

The constituent layers (photographic emulsion layer, dye fixing layer, etc.) of the light-sensitive element and/or dye fixing element of the present invention may contain an inorganic or organic hardening agent.

Specific examples of hardening agents include those described in JP-A-61-147244 and JP-A-59-157636, page (38), and these can be used alone or in combination.

Further, in order to promote dye transfer, a hydrophilic thermal solvent that is solid at room temperature and soluble at high temperature may be incorporated into the photosensitive element or dye fixing element.

The hydrophilic thermal solvent may be incorporated into either the photosensitive element or the dye fixing element, or may be incorporated into both. Further, the layer to be incorporated may be any of an emulsion layer, an intermediate layer, a protective layer, and a dye fixing layer, but it is preferably incorporated in the dye fixing layer and/or a layer adjacent thereto. When a hydrophilic thermal solvent is incorporated into the dye fixing element, the effect of preventing uneven transfer of the present invention is remarkable. Examples of hydrophilic heat solvents include ureas, pyridines, amides, sulfonamides, imides, alnyls, oximes, and other heterocycles. Further, in order to promote dye transfer, a high boiling point organic solvent may be contained in the photosensitive element and/or the dye fixing element.

The support used in the photosensitive element in this invention is one that can withstand processing temperatures. Common supports include glass, paper, polymer films, metals and their analogues, as well as JP-A-61-14
7244 as a support can be used.

The photosensitive element and/or the dye fixing element may be in the form of an electrically conductive heating layer as a heating means for thermal development or diffusion transfer of the dye.

The transparent or opaque heating element in this case can be made using conventionally known techniques for producing resistive heating elements.
As the resistance heating element, there are two methods: a method using a thin film of an inorganic material exhibiting semiconductivity, and a method using a perforated f# film in which conductive fine particles are dispersed in a binder. Materials that can be used in these methods include those described in Japanese Patent Application No. 151,815/1984.

In the present invention, the method of coating the heat-developable photosensitive layer, protective layer, intermediate layer, undercoat layer, back layer, dye fixing layer, and other layers is described in columns 55 to 56 of U.S. Pat. No. 4,500,626. method can be applied.

Radiation, including visible light, can be used as a light source for imagewise exposure to record an image on the photosensitive element. In general, light sources used for normal color printing, such as tungsten lamps, mercury lamps, halogen lamps such as iodine lamps, xenon lamps, laser light sources, CRT light sources, light emitting diodes (LEDs), etc.
No. 244 or U.S. Pat. No. 4,500.626, column 56, may be used.

In the present invention, the steps of thermal development and dye transfer may be performed independently or simultaneously. Further, it may be continuous in the sense that development is followed by transfer in one process.

For example, (1) after imagewise exposing and heating the photosensitive element,
There are two methods: (2) a method in which the dye-fixing elements are stacked and heated if necessary to transfer the mobile dye to the dye-fixing element; and (2) a photosensitive element is imagewise exposed, and the dye-fixing elements are stacked and heated.

The methods (1) and (2) above can be carried out in the substantial absence of water, or in the presence of 111 minute amounts of water.

The heating temperature in the heat development step can be developed at about 0°C to about 250°C, and particularly useful is about 0°C to about 180°C. When heating in the presence of a trace amount of water, the upper limit of the heating temperature is below the boiling point. When the transfer process is performed after the heat development process, the heating temperature in the transfer process can be in the range from the temperature in the heat development process to room temperature, but in particular, it is 50°C or higher, which is about 10°C lower than the temperature in the heat development process. More preferably up to temperature.

A preferred image forming method in the present invention involves heating in the presence of a trace amount of water and a base and/or a base precursor after or simultaneously with image exposure, and at the same time as development, diffusion is generated in a portion corresponding to or inversely corresponding to a silver image. The coloring matter is transferred to the dye fixing layer. According to this method, the production or release reaction of the diffusible dye proceeds extremely quickly, and the movement of the diffusible dye to the dye fixing layer also proceeds rapidly, so that a high-density color image can be obtained in a short time.

The amount of water used in this embodiment is at least 0.1 times, preferably 0.1 times or more, the weight of the total coating film of the light-sensitive element and dye fixing element, and the amount of solvent is equivalent to the maximum swelling volume of the total coating film. A small amount of less than the weight (particularly less than the weight of the solvent corresponding to the maximum swelling volume of the entire coating film minus the weight of the entire coating film) may be sufficient.

I&! The state of the film is unstable when moistened, and depending on the conditions, there is a risk of local bleeding.To avoid this, use water equivalent to the volume at maximum swelling of the total coating film thickness of the light-sensitive element and dye-fixing element. It is preferable that the amount is less than or equal to . Specifically, the total weight of the photosensitive element and the dye-fixing element is 1 g to 50 g, especially 2 g to 35 g, and more preferably 3 g to 25 g per square meter of area M.
A range of is preferred.

The base and/or base precursor used in this embodiment can be incorporated into both the photosensitive element and the dye fixing element.
It can also be supplied dissolved in water.

In the above embodiment, the image forming reaction system contains, as a base precursor, a basic metal compound that is sparingly soluble in water, and a compound that undergoes a complex formation reaction with a metal ion constituting the sparingly soluble metal compound using water as a medium; Preferably, the pH of the system is raised by reaction of these two compounds upon heating.

Here, the image reaction system means a region where an image forming reaction occurs. Specifically, layers belonging to both the photosensitive element and the dye fixing element can be mentioned. If two or more layers are present, any of the layers may be used.

The poorly soluble metal compound and the complex forming compound need to be added at least in separate layers in order to prevent them from reacting before the development process. For example, in a so-called mono-sheet material in which a photosensitive element and a dye fixing element are provided on the same support, it is preferable that the above-mentioned two additive layers are separate layers, and one or more layers are interposed between them. A more preferred embodiment is one in which the poorly soluble metal compound and the complex-forming compound are contained in layers provided on separate supports. for example,
It is preferable that the poorly soluble metal compound is contained in the photosensitive element and the complex-forming compound is contained in the dye fixing element having a support separate from the photosensitive element. In the present invention, the complex-forming compound may be supplied in the form of being dissolved in water, which is present in addition to the dye-fixing element. The poorly soluble metal compound may be added to any layer of the photosensitive element, such as the photosensitive layer, intermediate layer, or protective layer, or may be added to two or more layers separately.

When the poorly soluble metal compound or complex-forming compound is contained in the support layer, the amount added is as described above.
In addition, when the complex-forming compound is dissolved in water and supplied, 0.005 mol to 5 mol per liter,
In particular, a concentration of 0.05 mol to 2 mol is preferred.
The method for adding water to the photosensitive layer or dye fixing layer is as follows:
For example, there is a method described in JP-A-61-147244.

As a heating means in the development and/or transfer process, a hot plate, an iron, a hot roller, etc. are used.
There is a method described in No. 7244. In addition, layers of conductive materials such as graphite, carbon black, metals, etc. are applied to the photosensitive element and/or the dye fixing element,
This conductive layer may be heated directly by passing an electric current through it.

The pressure conditions and method of applying pressure when overlapping the photosensitive element and the dye fixing element and bringing them into close contact are described in Japanese Patent Application Laid-Open No. 1472-1986.
The method described in No. 44 can be applied.

Any of a variety of thermal development equipment can be used to process the photographic elements of this invention. For example, JP-A No. 59-75247,
Apparatuses described in Japanese Patent No. 59-177547, No. 59-181353, No. 60-18951, Japanese Utility Model Application No. 116734-1980, etc. are preferably used.

■Specific effects of the invention According to the present invention, even when dye fixing elements are stored in layers, the content of bases or base precursors can be prevented from decreasing, sufficient image density can be obtained, and it is possible to improve the image density during transfer. can prevent uneven density.

Generally, it is predicted that if the size of the matting agent is large, uneven transfer will occur during pressing during transfer, resulting in uneven density. Considering this point, such an effect is difficult to predict.

In addition to these, adhesion failures can also be prevented.

(2) Specific Examples of the Invention Hereinafter, specific examples of the present invention will be shown, and the effects of the present invention will be explained in further detail.

Example The method of making the emulsion for the first layer will be described.

A well-stirred aqueous gelatin solution (containing 20 g of gelatin and 3 g of sodium chloride in 1,000 ml of water and keeping it warm at 75°C) was mixed with an aqueous solution of 600 IIffi containing sodium chloride and potassium bromide and an aqueous solution of silver nitrate (in 600 ml of water). 0.59 mol of silver nitrate dissolved therein) was simultaneously added at an equal flow rate over a period of 40 minutes. In this way, a monodisperse cubic silver chlorobromide emulsion (80 mol % bromine) with an average grain size of 0.35 μm was prepared.

After washing with water and salting, 1 g of sodium thiosulfate 5I and 20 mg of 4-hydroxy-6-methyl-1,3,3a,7-chitrazaindene were added and chemical sensitization was performed at 60"C. The yield of the emulsion was 600 g. Met.

Next, I will talk about how to make the emulsion for the third layer.

A well-stirred gelatin aqueous solution (20 g of gelatin and 3 ml of sodium chloride in 1000 ml of water)
600 IIN, an aqueous solution containing sodium chloride and potassium bromide (containing 0.5 mol of silver nitrate dissolved in 600 ml of water), and the following dye solution (I ) were simultaneously added at equal flow rates over 40 minutes. In this way, a monodisperse cubic silver chlorobromide emulsion (bromine 80 mol %) was prepared, in which a dye having an average grain size of 0.35 μm was adsorbed.

After washing with water and desalting, 5 mg of sodium thiosulfate and 20 mg of 4-hydroxy-6-methyl-1,3,3a,7-chitrazaindene were added to perform chemical sensitization at 60°C. The yield of emulsion was 600 g.

C mouth-〇:! : ψ ゛ Next, we will explain how to make the silver halide emulsion for the fifth layer.

A well-stirred aqueous gelatin solution (20 g of gelatin and ammonia dissolved in 1000 mfi of water and kept at 50°C), an aqueous solution ID00ml containing potassium iodide and potassium bromide, and an aqueous solution of silver nitrate (in 1000 mfi of water) (1 mole of silver nitrate dissolved in)
were added at the same time while keeping the pAg constant. In this way, a monodispersed silver iodobromide octahedral emulsion (5 mol % of iodine) with an average grain size of 0.5 μm was prepared.

After washing with water and desalting, 5 mg of chloroauric acid (tetrahydrate) and 2 mg of sodium thiosulfate were added to perform gold and sulfur sensitization at 60°C. The yield of emulsion was 1.0 g.

, describes how to make organic silver salts.

Organic silver salt (1) This article describes how to make benzotriazole silver emulsion.

28 g of gelatin and 13.2 g of benzotriazole were dissolved in 3001 ffi of water. This solution was kept at 40°C and stirred. Add 17 g of silver nitrate to this solution.
was dissolved in 100 ml of water and added over 2 minutes.

The pH of the benzotriazole silver emulsion was adjusted and allowed to settle to remove excess salt. Then the pH was adjusted to 6.30.
In total, a benzotriazole silver emulsion with a yield of 400 g<7) was obtained.

Organic silver salt (2) 20 g of gelatin and 5.9 g of 4-acetylaminophenylpropiolic acid were mixed with 10 g of 0.1% aqueous sodium hydroxide solution.
00nd and dissolved in ethanol 200.

This solution was kept at 40°C and stirred.

A solution prepared by dissolving 4.5 g of silver nitrate in 200 ml of water was added to this solution over 5 minutes.

The pH of this dispersion was adjusted and the excess basin was removed by settling. Thereafter, the pH was adjusted to 6.3 to obtain a dispersion of organic silver salt (2) in a yield of 300 g.

Next, how to make a gelatin dispersion of a dye-donating substance will be described.

5g of yellow dye-donating substance (A), auxiliary developer (
Weighed 0.2 g of D), 0.2 g of antifoggant (E), 0.5 g of sodium cono-lambda phosphate-2-ethylhexyl ester sulfonate, and 25 g of triisononyl phosphate as surfactants. , 15IIN of ethyl acetate was added thereto, and the mixture was heated and dissolved at about 60° C. to form a homogeneous solution.

After stirring and mixing this solution and 40 g of a 10% solution of lime-treated gelatin, the mixture was heated to 10,000 g for 10 minutes using a homogenizer.
Dispersion was performed at rpm. This dispersion is called a yellow dye-providing substance dispersion.

A dispersion of a magenta dye-providing substance and a dispersion of a cyan dye-providing substance were prepared in the same manner as above, except that the magenta dye-providing substance (B) or the cyan dye-providing substance (C) was used. Had made.

η −= −〇 (C) Auxiliary developer (D) Antifoggant (E) Color photosensitive materials having a multilayer structure as shown in Table 1 were prepared from these.

Next, a dye fixing material having the structure shown in Table 2 was prepared.

The fine particle (matting agent) dispersions used in the back layer were Dispersions A to F shown in Table 3, and dye fixing materials 101 to 111 shown in Table 4 were used depending on the dispersions A to F of the support.

Table 2 *1) Surfactant A *2) Surfactant B +13 *3) Mordant *4) Oil droplet compound Nireophos ■95 [manufactured by Ajinomoto Co., Inc.] % gelatin aqueous solution, 5 mfi of 25% sodium dodecylbenzenesulfonate aqueous solution was added, and 20 g of Rheophos ■95 (manufactured by Ajinomoto Co., Inc.) was added and blended in a homo blender for 10. A dispersion of oil droplets prepared by emulsifying and dispersing for 6 minutes at OOOrpm was added to the coating liquid for the dye fixing layer (first layer).

*5) Hardening agent A *6) Surfactant C *7) Silicone oil droplets *4) Rheophos ■95 (manufactured by Ajinomoto Co., Inc.) was added to silicone oil (dimethylpolysiloxane) in the oil droplets of *4).
It was prepared in the same manner except that it was changed to

Table 3 D Polyethylene 48 5.2
1.5E polyethylene 48 6
．． 9 12F Polyethylene 48
8.8 50 phase J I S-7'215
/Based on Durometer D test.

The multilayer color photosensitive material was uniformly exposed to light for 1 second at 200 lux through a green filter using a tungsten bulb.

15nlt/r on the emulsion side of this exposed light-sensitive material
Water of n' was supplied with a wire bar, and then the dye fixing material and the membrane surface were overlapped so that they were in contact with each other.

In addition, the dye fixing material in this case is the above-mentioned material at 25°C.
Two sheets were stacked and stored for 2 days under a pressure of 70% RH 18 kg/A4 size so that one surface was in contact with the other back surface, and then used after being peeled off.

The film was heated for 25 seconds using a heat roller whose temperature was adjusted so that the temperature of the water-absorbed film was 90°C. Next, when it was peeled off from the dye-fixing material, a transferred color image of magenta on the film surface was obtained on the dye-fixing material.

The density of each color was measured and density unevenness was investigated.

The density was measured using a scanning type self-recording densitometer, and the magnitude of density unevenness was evaluated.

The results are shown in Table 4.

The indications in the table are as follows.

×: There is unevenness of ΔD=0.5 or more on the entire screen.

Δ: There is unevenness of ΔD=0.2 to 0.3 in 5 to 10% of the entire screen.

O: There is unevenness of ΔD=0.2-0.3 in 2-3% of the entire screen.

◎...No density unevenness.

Further, in Table 4, the haze degree (%) is also listed.

The haze level is measured using a haze meter Mod manufactured by Nippon Heavy Industries.
Measured using el 100IDP.

A dye fixing material using a transparent support (PUT) is generally used for OHP, and for this use it is desirable that the degree of haze is 10% or less. It can be seen that the dye fixing material produced according to the present invention has a haze degree of 10% or less and density unevenness is significantly reduced.

It can also be seen that even when a paper support is used, the dye fixing material produced according to the present invention has extremely small density unevenness.

Also, when peeling off two layers of dye-fixing material after storage,
If the dye fixing materials 101, 104, and 109 are not carefully removed, one coated film will adhere to the other and remain.
All of the dye-fixing materials of the present invention could be easily peeled off.

Procedural formalities (spontaneous) Kunio Ogawa, Commissioner of the Patent Office1, Indication of the case, Patent Application No. 110065 of 19882, Name of the invention, Dye fixation element3, Person making the amendment, Relationship with the case, Patent applicant Address 210 Nakanuma, Minamiashigara City, Kanagawa Prefecture Name (
520) Fuji Photo Film Co., Ltd. 4, Agent IO
I ff1864-4498 Address 3-2-2 Iwamoto-cho, Chiyoda-ku, Tokyo Name (8286) Patent Attorney Yo Ishii - ;゛t;5, Subject of amendment
b “Detailed Description of the Invention J” column of the specification
Jffi6, Contents of amendment (1) ro, 05J on the 3rd line of page 8 of the specification as rO,
Correct it to 005J.

(2) In the 5th line of the 9th page, "from the r back layer" is corrected to "from the back layer".

(3) Correct "toka" in the 20th line of page 32 to "toka".

(4) [Ethylene oxide] on page 33, line 4
Correct it to "ethylene oxide".

Claims (1)

[Claims] A dye fixing element having at least one dye fixing layer on one side of the support and a back layer containing at least one hydrophilic colloid on the opposite side,
A dye fixing element characterized in that the back layer contains particles having a particle size exceeding 10 μm at a rate of at least 0.002 cm^3/m^2.